aparler/RosettaCodeData
1
0
Fork 0
Code Issues 12 Pull requests 3 Projects Releases Packages Wiki Activity Actions

all tasks

Browse source
This commit is contained in:
Ingy döt Net 2013-04-11 01:07:29 -07:00
parent b83f433714
commit 68f8f3e56b
14735 changed files with 178959 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

12
Task/Sorting-algorithms-Counting-sort/Common-Lisp/sorting-algorithms-counting-sort.lisp Normal file
View file

@ -0,0 +1,12 @@
(defun counting-sort (sequence &optional (min (reduce #'min sequence))
(max (reduce #'max sequence)))
(let ((i 0)
(counts (make-array (1+ (- max min)) :initial-element 0
:element-type `(integer 0 ,(length sequence)))))
(declare (dynamic-extent counts))
(map nil (lambda (n) (incf (aref counts (- n min)))) sequence)
(map-into sequence (lambda ()
(do () ((plusp (aref counts i)))
(incf i))
(decf (aref counts i))
(+ i min)))))